FR2427738A1 - Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal - Google Patents

Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal

Info

Publication number
FR2427738A1
FR2427738A1 FR7816405A FR7816405A FR2427738A1 FR 2427738 A1 FR2427738 A1 FR 2427738A1 FR 7816405 A FR7816405 A FR 7816405A FR 7816405 A FR7816405 A FR 7816405A FR 2427738 A1 FR2427738 A1 FR 2427738A1
Authority
FR
France
Prior art keywords
gate
control circuit
counter
output
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7816405A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GONTHIER GERARD
Original Assignee
GONTHIER GERARD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GONTHIER GERARD filed Critical GONTHIER GERARD
Priority to FR7816405A priority Critical patent/FR2427738A1/en
Publication of FR2427738A1 publication Critical patent/FR2427738A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/292—Modifications for introducing a time delay before switching in thyristor, unijunction transistor or programmable unijunction transistor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Abstract

The electronic control circuit which is unlatched by a change in logic level of an input instruction signal includes a clock (3) providing a continuous pulse train, and a counter (9) receiving the clock pulses. A first NAND-gate (12) receives at its input (14) the instruction logic level signal, while its output (15) is connected to the counter (9) in order to start the counter when the level changes. A second NAND-gate (16) has one input (17) connected to the instruction signal, and the other input (18) connected to the counter output. A bistable circuit (20) is connected to the output of this gate in order to undergo a change of position when the second gate changes. A monostable circuit (28) having a predetermined recovery time is connected to the output of the second NAND-gate and to the bistable circuit.
FR7816405A 1978-06-01 1978-06-01 Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal Withdrawn FR2427738A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7816405A FR2427738A1 (en) 1978-06-01 1978-06-01 Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7816405A FR2427738A1 (en) 1978-06-01 1978-06-01 Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal

Publications (1)

Publication Number Publication Date
FR2427738A1 true FR2427738A1 (en) 1979-12-28

Family

ID=9208949

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7816405A Withdrawn FR2427738A1 (en) 1978-06-01 1978-06-01 Control circuit for alarm system - has two time delays controlling initiation and termination of alarm signal

Country Status (1)

Country Link
FR (1) FR2427738A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse